We calculated (REF ) analytically using FORM [1]} and the involved loop integrals
with Package-X [2]}. Table REF  contains the finite remainders of (REF )
for all helicity configurations evaluated at the test point \(m=17.3\)  GeV, \(s= 10^6\)  \(({\rm GeV})^2\) , \(t = -90\)  \(({\rm GeV})^2\) .
(\(v_e\)  and \(a_e\)  denote the vector and axial vector couplings of electron.)
